Book Image

Mastering CentOS 7 Linux Server

By : Mohamed Alibi, BHASKARJYOTI ROY
Book Image

Mastering CentOS 7 Linux Server

By: Mohamed Alibi, BHASKARJYOTI ROY

Overview of this book

Most server infrastructures are equipped with at least one Linux server that provides many essential services, both for a user's demands and for the infrastructure itself. Setting up a sustainable Linux server is one of the most demanding tasks for a system administrator to perform. However, learning multiple, new technologies to meet all of their needs is time-consuming. CentOS 7 is the brand new version of the CentOS Linux system under the RPM (Red Hat) family. It is one of the most widely-used operating systems, being the choice of many organizations across the world. With the help of this book, you will explore the best practices and administration tools of CentOS 7 Linux server along with implementing some of the most common Linux services. We start by explaining the initial steps you need to carry out after installing CentOS 7 by briefly explaining the concepts related to users, groups, and right management, along with some basic system security measures. Next, you will be introduced to the most commonly used services and shown in detail how to implement and deploy them so they can be used by internal or external users. Soon enough, you will be shown how to monitor the server. We will then move on to master the virtualization and cloud computing techniques. Finally, the book wraps up by explaining configuration management and some security tweaks. All these topics and more are covered in this comprehensive guide, which briefly demonstrates the latest changes to all of the services and tools with the recent shift from CentOS 6 to CentOS 7.
Table of Contents (16 chapters)
Mastering CentOS 7 Linux Server
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

The basics of virtualization on Linux


Virtualization is the capacity to create a machine-like program that simulates, the physical behavior of a real machine running through virtual hardware including CPU, RAM, Hard disk, Network card, and so on, where those resources are all being taken from the physical machine running the virtual one.

Earlier, the way of managing services was to deploy a new server or upgrade the old one to meet the requirements of the new services to perform long and complex migrations in the event of a hardware failure. All the time, there would be too little RAM, too few disks, or low processing power. Managers got tired of trying to fix the existent system while paying a lot of money to help maintain an old server that was no longer supported. However, they did not have too many options, since the services running on those machines were very important and essential. Companies were deploying servers that would not work on their peak capacity, and there was no better...